Move av1 cmake support into av1/av1.cmake.
BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76 Change-Id: Id5b5d42199897c441549eb2115a4443e93f1989b
av1/av1.cmake
0 → 100644
BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76 Change-Id: Id5b5d42199897c441549eb2115a4443e93f1989b